Patent GB-1377441-A (GB)
Title: Photographic cameras
IPC: G03B17/42
Filed: 1972-02-10
Abstract: 1377441 Photographic cameras EASTMAN KODAK CO 10 Feb 1972 [13 Feb1971] 6283/72 Heading G2A In a camera having an interlock between the film transport member and the shutter release, there is provided additional locking means to prevent actuation of the shutter release during operation of the transport member and to prevent the taking of a further photograph before the shutter release has returned to a rest position. The release 4, Fig. 1, on depression actuates a striker 7 to release the shutter 2, and passes through a recess 5 in a guide plane 6 for the transport member 3, a tab 4a on the release passing in front of a shoulder of the member 3. When the member 3.is moved to advance the film, a cam surface 8 thereon cams upwardly the tab 4a, and so long as the release is pressed down a step 8a on the cam engages behind the tab and prevents full retraction of the member 3, so that the release cannot be again actuated until it has first returned to rest position to release the member 3. In another form, Fig.2, the release 4 is depressed to enter the recess 5 while a pivoted latch 9 is in a recess 3b in the member 3. Until the release is raised, it prevents movement of the latch out of the recess and so prevents movement of the member 3. When the release is raised, movement of the member 3 cams the latch out of the recess so as to block downward movement of the release, until the member 3 returns to rest position, when a spring 10 returns the latch into the recess. If, when the member 3 is returned, the release is lowered on to the latch, a flange 9a on the latch prevents return of the latch. The flange 9a may be replaced by a rubber block on the latch or a spring finger on the release, providing frictional engagement between the release and the latch. In another form, Fig.5, a shoulder 4c on the release acts on an arm 13 pivoted at 14 to release the shutter. Actuation of the member 3 cams a part 13a of the arm 13 so as to move the latter out of the path of the shoulder 4c so that depression of the release does not actuate the shutter. If the release is now depressed, the arm 13 cannot return to normal position even when the member 3 is retracted. In another form, Fig.6, the release carries a latch 15 spring-urged to a position where its nose 15b engages the arm 13 and its toe 15A is in a recess in the member 3. When the member 3 is actuated, the toe 15A is cammed out of the recess so that the nose 15b does not engage the arm 13. Moreover, while the release is depressed, the nose 15b, which is hook-shaped, is prevented by the arm 13 from moving so as to allow the member 3 to move. In another form, Fig.7, the shutter-actuating arm 19 has a portion 19a passing beneath a two-armed lever 17 pivoted at 18 so as to be rockable in two planes. Depression of the release 4 moves an arm 17b of the lever 17 and the arm 19 down to actuate the shutter. On actuation of the member 3, a spring 21 rocks the lever 17 out of the path of the release, this being heretofore prevented by an arm 17a of the lever 17 engaging an end surface of the member 3. Moreover, if the release 4 is depressed after the member 3 is actuated, it holds the lever 17 in a position to prevent the return of the member 3. In another form, Fig.8, a first lever 22 pivoted at 24 replaces the arm 17b of the lever 17, the lever 22 being moved out of the path of the release through an intermediary second lever 23. In this case, the member 3 can be returned even while the release is depressed.